Keyword: Astronomy

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New doctoral research sheds new light on how quasars are formed

Quasars are extremely luminous galaxies and their light is produced by a supermassive black hole at their center, which is actively feeding on the cosmic gas and dust around it. Previous theories have suggested that quasars and their supermassive black holes are formed when galaxies collide, but a recent doctoral thesis at the University of Turku shows that quasars can form even in the absence of galaxy interactions.

Astrophysicists discover a puzzlingly perfect spherical explosion in space


When neutron stars collide, they produce a violent explosion. Data from the only well observed collision show that the explosion was perfectly spherical, completely contrary to expectations. How this is possible remains a mystery, but the discovery may provide a new key to fundamental physics and to measuring the age of the Universe. The discovery was made by an international collaboration led by astrophysicists from the University of Copenhagen and including researchers from the University of Turku. The research has just been published in the journal Nature.

Polarized X-rays reveal shape and orientation of extremely hot matter around black hole


The researchers observed the X-ray radiation from the matter around a black hole. According to the researchers the shape and orientation of the X-ray glow support the theory, that the X-rays come from the disc-shaped material flowing into the black hole which is perpendicular to previously imaged relativistic outflows of matter called jets. These findings give a better understanding about the inner workings of black holes and how they consume mass.